Trivia: The scene in which the blue car does several flips on the grass would later be used in the first season of the TV show "The Fall Guy" starring Lee Majors.
Trivia: Max von Sydow is only 11 years older than Joanna Miles in real life, despite portraying her father.
Trivia: Production of this movie was not easy for John Wayne. The actor was suffering from heart problems and had only just recovered from a severe bout of pneumonia.